Linux U盘分区格式化 fdisk命令

编程知识更新时间:2023-04-29 10:54:45

Linux U盘分区格式化 fdisk命令今天为方便修复系统，做了个U盘WINPE的启动盘。当我兴高采烈的将这个U盘插到Linux虚拟机上却发现出现了4个分区，而且根本就挂不上，顿时便郁闷了！看来这样的分区Linux识别不了。只有用个专门的U盘来当启动盘了。这个U盘我还得用来拷资料呢，那就乖乖的恢复它吧。首先想到的是在windows下格式化，这是最简单的了。一试，没用，分区表格不了看来得用命令行的删除分区信息的工具了，无奈，对windows 命令不熟悉，只能放弃了。。。于是想到了linux下fdisk这个东东，以前没仔细研究过，看来是刚拿来研究的时候了。 google找了个教程，作为参考： -------------------------------------------------------------
#fdisk /dev/sdb    /*进入fdisk命令操作空间*/
#Command (m for help): m     /*命令查看*/
Command action
a   toggle a bootable flag 设置引导扇区
b   edit bsd disklabel     编辑卷标（linux下使用的卷标bsd通用）
c   toggle the dos compatibility flag
d   delete a partition
l   list known partition types
m   print this menu
n   add a new partition
o   create a new empty DOS partition table
p   print the partition table
q   quit without saving changes
s   create a new empty Sun disklabel
t   change a partition's system id
u   change display/entry units
v   verify the partition table
w   write table to disk and exit
x   extra functionality (experts only)
#Command (m for help): p
Disk /dev/sdb: 2055 MB, 2055208960 bytes
64 heads, 62 sectors/track, 1011 cylinders
Units = cylinders of 3968 * 512 = 2031616 bytes
Disk identifier: 0x00000000

Device Boot      Start         End      Blocks   Id System
/dev/sdb1               1         133      263871+   6 FAT16
/dev/sdb2   *         134         200      132928   83 Linux          /*boot 分区*/

＃Command (m for help): d
＃Partition number (1-4): 1

Command (m for help): p

Disk /dev/sdb: 2055 MB, 2055208960 bytes
64 heads, 62 sectors/track, 1011 cylinders
Units = cylinders of 3968 * 512 = 2031616 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System
/dev/sdb2 * 134 200 132928 83 Linu

＃Command (m for help): d
Selected partition 2

＃Command (m for help): p /*查看此时已无分区*/

Disk /dev/sdb: 2055 MB, 2055208960 bytes
64 heads, 62 sectors/track, 1011 cylinders
Units = cylinders of 3968 * 512 = 2031616 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System

＃Command (m for help): w /*最后写入分区表*/
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.

/*下边给磁盘增加一分区并格式化*/

＃ls /dev/sd*

＃/dev/sda /dev/sda1 /dev/sda2 /dev/sdb

＃Command (m for help): n
Command action
e   extended
p   primary partition (1-4)
＃p                                                                                                  /*增加主分区*/
＃Partition number (1-4): 1
＃First cylinder (1-1011, default 1):                                         /*回车默认*/
Using default value 1
＃Last cylinder, +cylinders or +size{K,M,G} (1-1011, default 1011):                       /*回车默认*/
Using default value 1011

＃Command (m for help): p                                            /*此时有sdb1分区*/

Disk /dev/sdb: 2055 MB, 2055208960 bytes
64 heads, 62 sectors/track, 1011 cylinders
Units = cylinders of 3968 * 512 = 2031616 bytes
Disk identifier: 0x00000000

Device Boot      Start         End      Blocks   Id System
/dev/sdb1               1        1011     2005793   83 Linux